function TButtonGlyph_Draw(Control: TControl; Canvas: TCanvas; const Client: TRect; const Offset: TPoint; const Caption: WideString; Layout: TButtonLayout; Margin: Integer; Spacing: Integer; State: TButtonState; Transparent: Boolean; BiDiFlags: Longint; WordWrap: Boolean): TRect;
This is function TntButtons.TButtonGlyph_Draw.